The Trumps emerged from the front door of the White House at 1:12 p.m. to take part in the ceremony as they greeted the horse-drawn carriage carrying the tree.
Donald Trump was joined by the first lady for the ceremony although the president doesn't typically make an appearance. Their 12-year-old son Barron Trump was absent after attending last year.
Smith was named grand champion in the National Christmas Tree Association's Christmas tree contest last summer, earning him the opportunity to present a Christmas tree to the White House.
"I feel as though I have finally won the Super Bowl. It's a great honor to represent the Christmas tree industry by providing the official White House Christmas tree in 2018," Smith said.
The tree will be put on display in the Blue Room of the White House for the holiday season.